Eric -- yes, I certainly understand that Russian деепричастия will often be translated by -ing forms in English, but not all -ing forms are gerunds, and one would expect a professionally edited college textbook to be more accurate.

(But on the other hand, since most American college freshmen wouldn't recognize a gerund даже ни в случае, что оно укусило бы их по жопе*, there's probably no real confusion caused here -- it's just an empty gap that has to be filled in by whomever is teaching them about Russian grammar.)

* "Not even if it bit them on the ass" is the English expression I'm going for here. But maybe the construction should be укусило жопу у них, or something like that? In other words, I'm not sure if it's "them" or "their ass" that should be in the винительном падеже!

This is always confusing for me in Russian, when you're talking about doing something to a part of someone's body -- like kissing a lady's hand, putting a bandage on a child's knee, jabbing a pencil into a zombie's eye, scratching a puppy's tummy, or kicking a man in the "Бальзак".